Reduce eye pressure: protective glasses filter glasses can help you filter light in colours other than red in nature. If your eyes are tired by the bright or flashing laser beam, wearing glasses helps reduce eye pressureGet long-lasting safety: no more heavy, uncomfortable safety glasses. These light filter glasses are lightweight and flexible, with a non-slip frame yet durable. They come with shatter-proof lenses made of polycarbonate plasticWavelength Laser Safety GlassesSpecifications: laser safety glasses can prevent red light with 650 nm wavelength, blue light with 445 nm wavelength and blue-purple light with 405 nm wavelength. Such safety glasses protect against lasers with a wavelength of 405-1064 nmThe professional choice: the light safety glasses have been developed to provide protection that is suitable for a variety of professional and private applications, wherever UV light is in play and your eyes need protection They are also great for blocking blue lightNote: may not fit over normal glasses unless the normal glasses have a very thin frame. Wavelength laser safety glasses have two optional colours with independent glasses case with fine workmanship and beautiful look"